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const: make struct super_block::dq_op const
[linux-2.6/x86.git] / drivers / net / usb / kaweth.c
blobe2a39b9be96e25fcea7faefca6328e1d3b2d3e2b
1 /****************************************************************
2 *
3 * kaweth.c - driver for KL5KUSB101 based USB->Ethernet
4 *
5 * (c) 2000 Interlan Communications
6 * (c) 2000 Stephane Alnet
7 * (C) 2001 Brad Hards
8 * (C) 2002 Oliver Neukum
9 *
10 * Original author: The Zapman <zapman@interlan.net>
11 * Inspired by, and much credit goes to Michael Rothwell
12 * <rothwell@interlan.net> for the test equipment, help, and patience
13 * Based off of (and with thanks to) Petko Manolov's pegaus.c driver.
14 * Also many thanks to Joel Silverman and Ed Surprenant at Kawasaki
15 * for providing the firmware and driver resources.
16 *
17 * This program is free software; you can redistribute it and/or
18 * modify it under the terms of the GNU General Public License as
19 * published by the Free Software Foundation; either version 2, or
20 * (at your option) any later version.
21 *
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
26 *
27 * You should have received a copy of the GNU General Public License
28 * along with this program; if not, write to the Free Software Foundation,
29 * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
30 *
31 ****************************************************************/
32
33 /* TODO:
34 * Develop test procedures for USB net interfaces
35 * Run test procedures
36 * Fix bugs from previous two steps
37 * Snoop other OSs for any tricks we're not doing
38 * Reduce arbitrary timeouts
39 * Smart multicast support
40 * Temporary MAC change support
41 * Tunable SOFs parameter - ioctl()?
42 * Ethernet stats collection
43 * Code formatting improvements
44 */
45
46 #include <linux/module.h>
47 #include <linux/slab.h>
48 #include <linux/string.h>
49 #include <linux/init.h>
50 #include <linux/delay.h>
51 #include <linux/netdevice.h>
52 #include <linux/etherdevice.h>
53 #include <linux/usb.h>
54 #include <linux/types.h>
55 #include <linux/ethtool.h>
56 #include <linux/dma-mapping.h>
57 #include <linux/wait.h>
58 #include <linux/firmware.h>
59 #include <asm/uaccess.h>
60 #include <asm/byteorder.h>
61
62 #undef DEBUG
63
64 #define KAWETH_MTU 1514
65 #define KAWETH_BUF_SIZE 1664
66 #define KAWETH_TX_TIMEOUT (5 * HZ)
67 #define KAWETH_SCRATCH_SIZE 32
68 #define KAWETH_FIRMWARE_BUF_SIZE 4096
69 #define KAWETH_CONTROL_TIMEOUT (30000)
70
71 #define KAWETH_STATUS_BROKEN 0x0000001
72 #define KAWETH_STATUS_CLOSING 0x0000002
73 #define KAWETH_STATUS_SUSPENDING 0x0000004
74
75 #define KAWETH_STATUS_BLOCKED (KAWETH_STATUS_CLOSING | KAWETH_STATUS_SUSPENDING)
76
77 #define KAWETH_PACKET_FILTER_PROMISCUOUS 0x01
78 #define KAWETH_PACKET_FILTER_ALL_MULTICAST 0x02
79 #define KAWETH_PACKET_FILTER_DIRECTED 0x04
80 #define KAWETH_PACKET_FILTER_BROADCAST 0x08
81 #define KAWETH_PACKET_FILTER_MULTICAST 0x10
82
83 /* Table 7 */
84 #define KAWETH_COMMAND_GET_ETHERNET_DESC 0x00
85 #define KAWETH_COMMAND_MULTICAST_FILTERS 0x01
86 #define KAWETH_COMMAND_SET_PACKET_FILTER 0x02
87 #define KAWETH_COMMAND_STATISTICS 0x03
88 #define KAWETH_COMMAND_SET_TEMP_MAC 0x06
89 #define KAWETH_COMMAND_GET_TEMP_MAC 0x07
90 #define KAWETH_COMMAND_SET_URB_SIZE 0x08
91 #define KAWETH_COMMAND_SET_SOFS_WAIT 0x09
92 #define KAWETH_COMMAND_SCAN 0xFF
93
94 #define KAWETH_SOFS_TO_WAIT 0x05
95
96 #define INTBUFFERSIZE 4
97
98 #define STATE_OFFSET 0
99 #define STATE_MASK 0x40
100 #define STATE_SHIFT 5
101
102 #define IS_BLOCKED(s) (s & KAWETH_STATUS_BLOCKED)
103
104
105 MODULE_AUTHOR("Michael Zappe <zapman@interlan.net>, Stephane Alnet <stephane@u-picardie.fr>, Brad Hards <bhards@bigpond.net.au> and Oliver Neukum <oliver@neukum.org>");
106 MODULE_DESCRIPTION("KL5USB101 USB Ethernet driver");
107 MODULE_LICENSE("GPL");
108 MODULE_FIRMWARE("kaweth/new_code.bin");
109 MODULE_FIRMWARE("kaweth/new_code_fix.bin");
110 MODULE_FIRMWARE("kaweth/trigger_code.bin");
111 MODULE_FIRMWARE("kaweth/trigger_code_fix.bin");
112
113 static const char driver_name[] = "kaweth";
114
115 static int kaweth_probe(
116 struct usb_interface *intf,
117 const struct usb_device_id *id /* from id_table */
118 );
119 static void kaweth_disconnect(struct usb_interface *intf);
120 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
121 unsigned int pipe,
122 struct usb_ctrlrequest *cmd, void *data,
123 int len, int timeout);
124 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message);
125 static int kaweth_resume(struct usb_interface *intf);
126
127 /****************************************************************
128 * usb_device_id
129 ****************************************************************/
130 static struct usb_device_id usb_klsi_table[] = {
131 { USB_DEVICE(0x03e8, 0x0008) }, /* AOX Endpoints USB Ethernet */
132 { USB_DEVICE(0x04bb, 0x0901) }, /* I-O DATA USB-ET/T */
133 { USB_DEVICE(0x0506, 0x03e8) }, /* 3Com 3C19250 */
134 { USB_DEVICE(0x0506, 0x11f8) }, /* 3Com 3C460 */
135 { USB_DEVICE(0x0557, 0x2002) }, /* ATEN USB Ethernet */
136 { USB_DEVICE(0x0557, 0x4000) }, /* D-Link DSB-650C */
137 { USB_DEVICE(0x0565, 0x0002) }, /* Peracom Enet */
138 { USB_DEVICE(0x0565, 0x0003) }, /* Optus@Home UEP1045A */
139 { USB_DEVICE(0x0565, 0x0005) }, /* Peracom Enet2 */
140 { USB_DEVICE(0x05e9, 0x0008) }, /* KLSI KL5KUSB101B */
141 { USB_DEVICE(0x05e9, 0x0009) }, /* KLSI KL5KUSB101B (Board change) */
142 { USB_DEVICE(0x066b, 0x2202) }, /* Linksys USB10T */
143 { USB_DEVICE(0x06e1, 0x0008) }, /* ADS USB-10BT */
144 { USB_DEVICE(0x06e1, 0x0009) }, /* ADS USB-10BT */
145 { USB_DEVICE(0x0707, 0x0100) }, /* SMC 2202USB */
146 { USB_DEVICE(0x07aa, 0x0001) }, /* Correga K.K. */
147 { USB_DEVICE(0x07b8, 0x4000) }, /* D-Link DU-E10 */
148 { USB_DEVICE(0x0846, 0x1001) }, /* NetGear EA-101 */
149 { USB_DEVICE(0x0846, 0x1002) }, /* NetGear EA-101 */
150 { USB_DEVICE(0x085a, 0x0008) }, /* PortGear Ethernet Adapter */
151 { USB_DEVICE(0x085a, 0x0009) }, /* PortGear Ethernet Adapter */
152 { USB_DEVICE(0x087d, 0x5704) }, /* Jaton USB Ethernet Device Adapter */
153 { USB_DEVICE(0x0951, 0x0008) }, /* Kingston Technology USB Ethernet Adapter */
154 { USB_DEVICE(0x095a, 0x3003) }, /* Portsmith Express Ethernet Adapter */
155 { USB_DEVICE(0x10bd, 0x1427) }, /* ASANTE USB To Ethernet Adapter */
156 { USB_DEVICE(0x1342, 0x0204) }, /* Mobility USB-Ethernet Adapter */
157 { USB_DEVICE(0x13d2, 0x0400) }, /* Shark Pocket Adapter */
158 { USB_DEVICE(0x1485, 0x0001) }, /* Silicom U2E */
159 { USB_DEVICE(0x1485, 0x0002) }, /* Psion Dacom Gold Port Ethernet */
160 { USB_DEVICE(0x1645, 0x0005) }, /* Entrega E45 */
161 { USB_DEVICE(0x1645, 0x0008) }, /* Entrega USB Ethernet Adapter */
162 { USB_DEVICE(0x1645, 0x8005) }, /* PortGear Ethernet Adapter */
163 { USB_DEVICE(0x1668, 0x0323) }, /* Actiontec USB Ethernet */
164 { USB_DEVICE(0x2001, 0x4000) }, /* D-link DSB-650C */
165 {} /* Null terminator */
166 };
167
168 MODULE_DEVICE_TABLE (usb, usb_klsi_table);
169
170 /****************************************************************
171 * kaweth_driver
172 ****************************************************************/
173 static struct usb_driver kaweth_driver = {
174 .name = driver_name,
175 .probe = kaweth_probe,
176 .disconnect = kaweth_disconnect,
177 .suspend = kaweth_suspend,
178 .resume = kaweth_resume,
179 .id_table = usb_klsi_table,
180 .supports_autosuspend = 1,
181 };
182
183 typedef __u8 eth_addr_t[6];
184
185 /****************************************************************
186 * usb_eth_dev
187 ****************************************************************/
188 struct usb_eth_dev {
189 char *name;
190 __u16 vendor;
191 __u16 device;
192 void *pdata;
193 };
194
195 /****************************************************************
196 * kaweth_ethernet_configuration
197 * Refer Table 8
198 ****************************************************************/
199 struct kaweth_ethernet_configuration
200 {
201 __u8 size;
202 __u8 reserved1;
203 __u8 reserved2;
204 eth_addr_t hw_addr;
205 __u32 statistics_mask;
206 __le16 segment_size;
207 __u16 max_multicast_filters;
208 __u8 reserved3;
209 } __attribute__ ((packed));
210
211 /****************************************************************
212 * kaweth_device
213 ****************************************************************/
214 struct kaweth_device
215 {
216 spinlock_t device_lock;
217
218 __u32 status;
219 int end;
220 int suspend_lowmem_rx;
221 int suspend_lowmem_ctrl;
222 int linkstate;
223 int opened;
224 struct delayed_work lowmem_work;
225
226 struct usb_device *dev;
227 struct usb_interface *intf;
228 struct net_device *net;
229 wait_queue_head_t term_wait;
230
231 struct urb *rx_urb;
232 struct urb *tx_urb;
233 struct urb *irq_urb;
234
235 dma_addr_t intbufferhandle;
236 __u8 *intbuffer;
237 dma_addr_t rxbufferhandle;
238 __u8 *rx_buf;
239
240
241 struct sk_buff *tx_skb;
242
243 __u8 *firmware_buf;
244 __u8 scratch[KAWETH_SCRATCH_SIZE];
245 __u16 packet_filter_bitmap;
246
247 struct kaweth_ethernet_configuration configuration;
248
249 struct net_device_stats stats;
250 };
251
252 /****************************************************************
253 * kaweth_control
254 ****************************************************************/
255 static int kaweth_control(struct kaweth_device *kaweth,
256 unsigned int pipe,
257 __u8 request,
258 __u8 requesttype,
259 __u16 value,
260 __u16 index,
261 void *data,
262 __u16 size,
263 int timeout)
264 {
265 struct usb_ctrlrequest *dr;
266
267 dbg("kaweth_control()");
268
269 if(in_interrupt()) {
270 dbg("in_interrupt()");
271 return -EBUSY;
272 }
273
274 dr = kmalloc(sizeof(struct usb_ctrlrequest), GFP_ATOMIC);
275
276 if (!dr) {
277 dbg("kmalloc() failed");
278 return -ENOMEM;
279 }
280
281 dr->bRequestType= requesttype;
282 dr->bRequest = request;
283 dr->wValue = cpu_to_le16(value);
284 dr->wIndex = cpu_to_le16(index);
285 dr->wLength = cpu_to_le16(size);
286
287 return kaweth_internal_control_msg(kaweth->dev,
288 pipe,
289 dr,
290 data,
291 size,
292 timeout);
293 }
294
295 /****************************************************************
296 * kaweth_read_configuration
297 ****************************************************************/
298 static int kaweth_read_configuration(struct kaweth_device *kaweth)
299 {
300 int retval;
301
302 dbg("Reading kaweth configuration");
303
304 retval = kaweth_control(kaweth,
305 usb_rcvctrlpipe(kaweth->dev, 0),
306 KAWETH_COMMAND_GET_ETHERNET_DESC,
307 USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
308 0,
309 0,
310 (void *)&kaweth->configuration,
311 sizeof(kaweth->configuration),
312 KAWETH_CONTROL_TIMEOUT);
313
314 return retval;
315 }
316
317 /****************************************************************
318 * kaweth_set_urb_size
319 ****************************************************************/
320 static int kaweth_set_urb_size(struct kaweth_device *kaweth, __u16 urb_size)
321 {
322 int retval;
323
324 dbg("Setting URB size to %d", (unsigned)urb_size);
325
326 retval = kaweth_control(kaweth,
327 usb_sndctrlpipe(kaweth->dev, 0),
328 KAWETH_COMMAND_SET_URB_SIZE,
329 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
330 urb_size,
331 0,
332 (void *)&kaweth->scratch,
333 0,
334 KAWETH_CONTROL_TIMEOUT);
335
336 return retval;
337 }
338
339 /****************************************************************
340 * kaweth_set_sofs_wait
341 ****************************************************************/
342 static int kaweth_set_sofs_wait(struct kaweth_device *kaweth, __u16 sofs_wait)
343 {
344 int retval;
345
346 dbg("Set SOFS wait to %d", (unsigned)sofs_wait);
347
348 retval = kaweth_control(kaweth,
349 usb_sndctrlpipe(kaweth->dev, 0),
350 KAWETH_COMMAND_SET_SOFS_WAIT,
351 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
352 sofs_wait,
353 0,
354 (void *)&kaweth->scratch,
355 0,
356 KAWETH_CONTROL_TIMEOUT);
357
358 return retval;
359 }
360
361 /****************************************************************
362 * kaweth_set_receive_filter
363 ****************************************************************/
364 static int kaweth_set_receive_filter(struct kaweth_device *kaweth,
365 __u16 receive_filter)
366 {
367 int retval;
368
369 dbg("Set receive filter to %d", (unsigned)receive_filter);
370
371 retval = kaweth_control(kaweth,
372 usb_sndctrlpipe(kaweth->dev, 0),
373 KAWETH_COMMAND_SET_PACKET_FILTER,
374 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
375 receive_filter,
376 0,
377 (void *)&kaweth->scratch,
378 0,
379 KAWETH_CONTROL_TIMEOUT);
380
381 return retval;
382 }
383
384 /****************************************************************
385 * kaweth_download_firmware
386 ****************************************************************/
387 static int kaweth_download_firmware(struct kaweth_device *kaweth,
388 const char *fwname,
389 __u8 interrupt,
390 __u8 type)
391 {
392 const struct firmware *fw;
393 int data_len;
394 int ret;
395
396 ret = request_firmware(&fw, fwname, &kaweth->dev->dev);
397 if (ret) {
398 err("Firmware request failed\n");
399 return ret;
400 }
401
402 if (fw->size > KAWETH_FIRMWARE_BUF_SIZE) {
403 err("Firmware too big: %zu", fw->size);
404 return -ENOSPC;
405 }
406 data_len = fw->size;
407 memcpy(kaweth->firmware_buf, fw->data, fw->size);
408
409 release_firmware(fw);
410
411 kaweth->firmware_buf[2] = (data_len & 0xFF) - 7;
412 kaweth->firmware_buf[3] = data_len >> 8;
413 kaweth->firmware_buf[4] = type;
414 kaweth->firmware_buf[5] = interrupt;
415
416 dbg("High: %i, Low:%i", kaweth->firmware_buf[3],
417 kaweth->firmware_buf[2]);
418
419 dbg("Downloading firmware at %p to kaweth device at %p",
420 fw->data, kaweth);
421 dbg("Firmware length: %d", data_len);
422
423 return kaweth_control(kaweth,
424 usb_sndctrlpipe(kaweth->dev, 0),
425 KAWETH_COMMAND_SCAN,
426 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
427 0,
428 0,
429 (void *)kaweth->firmware_buf,
430 data_len,
431 KAWETH_CONTROL_TIMEOUT);
432 }
433
434 /****************************************************************
435 * kaweth_trigger_firmware
436 ****************************************************************/
437 static int kaweth_trigger_firmware(struct kaweth_device *kaweth,
438 __u8 interrupt)
439 {
440 kaweth->firmware_buf[0] = 0xB6;
441 kaweth->firmware_buf[1] = 0xC3;
442 kaweth->firmware_buf[2] = 0x01;
443 kaweth->firmware_buf[3] = 0x00;
444 kaweth->firmware_buf[4] = 0x06;
445 kaweth->firmware_buf[5] = interrupt;
446 kaweth->firmware_buf[6] = 0x00;
447 kaweth->firmware_buf[7] = 0x00;
448
449 dbg("Triggering firmware");
450
451 return kaweth_control(kaweth,
452 usb_sndctrlpipe(kaweth->dev, 0),
453 KAWETH_COMMAND_SCAN,
454 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
455 0,
456 0,
457 (void *)kaweth->firmware_buf,
458 8,
459 KAWETH_CONTROL_TIMEOUT);
460 }
461
462 /****************************************************************
463 * kaweth_reset
464 ****************************************************************/
465 static int kaweth_reset(struct kaweth_device *kaweth)
466 {
467 int result;
468
469 dbg("kaweth_reset(%p)", kaweth);
470 result = kaweth_control(kaweth,
471 usb_sndctrlpipe(kaweth->dev, 0),
472 USB_REQ_SET_CONFIGURATION,
473 0,
474 kaweth->dev->config[0].desc.bConfigurationValue,
475 0,
476 NULL,
477 0,
478 KAWETH_CONTROL_TIMEOUT);
479
480 mdelay(10);
481
482 dbg("kaweth_reset() returns %d.",result);
483
484 return result;
485 }
486
487 static void kaweth_usb_receive(struct urb *);
488 static int kaweth_resubmit_rx_urb(struct kaweth_device *, gfp_t);
489
490 /****************************************************************
491 int_callback
492 *****************************************************************/
493
494 static void kaweth_resubmit_int_urb(struct kaweth_device *kaweth, gfp_t mf)
495 {
496 int status;
497
498 status = usb_submit_urb (kaweth->irq_urb, mf);
499 if (unlikely(status == -ENOMEM)) {
500 kaweth->suspend_lowmem_ctrl = 1;
501 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
502 } else {
503 kaweth->suspend_lowmem_ctrl = 0;
504 }
505
506 if (status)
507 err ("can't resubmit intr, %s-%s, status %d",
508 kaweth->dev->bus->bus_name,
509 kaweth->dev->devpath, status);
510 }
511
512 static void int_callback(struct urb *u)
513 {
514 struct kaweth_device *kaweth = u->context;
515 int act_state;
516 int status = u->status;
517
518 switch (status) {
519 case 0: /* success */
520 break;
521 case -ECONNRESET: /* unlink */
522 case -ENOENT:
523 case -ESHUTDOWN:
524 return;
525 /* -EPIPE: should clear the halt */
526 default: /* error */
527 goto resubmit;
528 }
529
530 /* we check the link state to report changes */
531 if (kaweth->linkstate != (act_state = ( kaweth->intbuffer[STATE_OFFSET] | STATE_MASK) >> STATE_SHIFT)) {
532 if (act_state)
533 netif_carrier_on(kaweth->net);
534 else
535 netif_carrier_off(kaweth->net);
536
537 kaweth->linkstate = act_state;
538 }
539 resubmit:
540 kaweth_resubmit_int_urb(kaweth, GFP_ATOMIC);
541 }
542
543 static void kaweth_resubmit_tl(struct work_struct *work)
544 {
545 struct kaweth_device *kaweth =
546 container_of(work, struct kaweth_device, lowmem_work.work);
547
548 if (IS_BLOCKED(kaweth->status))
549 return;
550
551 if (kaweth->suspend_lowmem_rx)
552 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
553
554 if (kaweth->suspend_lowmem_ctrl)
555 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
556 }
557
558
559 /****************************************************************
560 * kaweth_resubmit_rx_urb
561 ****************************************************************/
562 static int kaweth_resubmit_rx_urb(struct kaweth_device *kaweth,
563 gfp_t mem_flags)
564 {
565 int result;
566
567 usb_fill_bulk_urb(kaweth->rx_urb,
568 kaweth->dev,
569 usb_rcvbulkpipe(kaweth->dev, 1),
570 kaweth->rx_buf,
571 KAWETH_BUF_SIZE,
572 kaweth_usb_receive,
573 kaweth);
574 kaweth->rx_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
575 kaweth->rx_urb->transfer_dma = kaweth->rxbufferhandle;
576
577 if((result = usb_submit_urb(kaweth->rx_urb, mem_flags))) {
578 if (result == -ENOMEM) {
579 kaweth->suspend_lowmem_rx = 1;
580 schedule_delayed_work(&kaweth->lowmem_work, HZ/4);
581 }
582 err("resubmitting rx_urb %d failed", result);
583 } else {
584 kaweth->suspend_lowmem_rx = 0;
585 }
586
587 return result;
588 }
589
590 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth);
591
592 /****************************************************************
593 * kaweth_usb_receive
594 ****************************************************************/
595 static void kaweth_usb_receive(struct urb *urb)
596 {
597 struct kaweth_device *kaweth = urb->context;
598 struct net_device *net = kaweth->net;
599 int status = urb->status;
600
601 int count = urb->actual_length;
602 int count2 = urb->transfer_buffer_length;
603
604 __u16 pkt_len = le16_to_cpup((__le16 *)kaweth->rx_buf);
605
606 struct sk_buff *skb;
607
608 if (unlikely(status == -EPIPE)) {
609 kaweth->stats.rx_errors++;
610 kaweth->end = 1;
611 wake_up(&kaweth->term_wait);
612 dbg("Status was -EPIPE.");
613 return;
614 }
615 if (unlikely(status == -ECONNRESET || status == -ESHUTDOWN)) {
616 /* we are killed - set a flag and wake the disconnect handler */
617 kaweth->end = 1;
618 wake_up(&kaweth->term_wait);
619 dbg("Status was -ECONNRESET or -ESHUTDOWN.");
620 return;
621 }
622 if (unlikely(status == -EPROTO || status == -ETIME ||
623 status == -EILSEQ)) {
624 kaweth->stats.rx_errors++;
625 dbg("Status was -EPROTO, -ETIME, or -EILSEQ.");
626 return;
627 }
628 if (unlikely(status == -EOVERFLOW)) {
629 kaweth->stats.rx_errors++;
630 dbg("Status was -EOVERFLOW.");
631 }
632 spin_lock(&kaweth->device_lock);
633 if (IS_BLOCKED(kaweth->status)) {
634 spin_unlock(&kaweth->device_lock);
635 return;
636 }
637 spin_unlock(&kaweth->device_lock);
638
639 if(status && status != -EREMOTEIO && count != 1) {
640 err("%s RX status: %d count: %d packet_len: %d",
641 net->name,
642 status,
643 count,
644 (int)pkt_len);
645 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
646 return;
647 }
648
649 if(kaweth->net && (count > 2)) {
650 if(pkt_len > (count - 2)) {
651 err("Packet length too long for USB frame (pkt_len: %x, count: %x)",pkt_len, count);
652 err("Packet len & 2047: %x", pkt_len & 2047);
653 err("Count 2: %x", count2);
654 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
655 return;
656 }
657
658 if(!(skb = dev_alloc_skb(pkt_len+2))) {
659 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
660 return;
661 }
662
663 skb_reserve(skb, 2); /* Align IP on 16 byte boundaries */
664
665 skb_copy_to_linear_data(skb, kaweth->rx_buf + 2, pkt_len);
666
667 skb_put(skb, pkt_len);
668
669 skb->protocol = eth_type_trans(skb, net);
670
671 netif_rx(skb);
672
673 kaweth->stats.rx_packets++;
674 kaweth->stats.rx_bytes += pkt_len;
675 }
676
677 kaweth_resubmit_rx_urb(kaweth, GFP_ATOMIC);
678 }
679
680 /****************************************************************
681 * kaweth_open
682 ****************************************************************/
683 static int kaweth_open(struct net_device *net)
684 {
685 struct kaweth_device *kaweth = netdev_priv(net);
686 int res;
687
688 dbg("Opening network device.");
689
690 res = usb_autopm_get_interface(kaweth->intf);
691 if (res) {
692 err("Interface cannot be resumed.");
693 return -EIO;
694 }
695 res = kaweth_resubmit_rx_urb(kaweth, GFP_KERNEL);
696 if (res)
697 goto err_out;
698
699 usb_fill_int_urb(
700 kaweth->irq_urb,
701 kaweth->dev,
702 usb_rcvintpipe(kaweth->dev, 3),
703 kaweth->intbuffer,
704 INTBUFFERSIZE,
705 int_callback,
706 kaweth,
707 250); /* overriding the descriptor */
708 kaweth->irq_urb->transfer_dma = kaweth->intbufferhandle;
709 kaweth->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
710
711 res = usb_submit_urb(kaweth->irq_urb, GFP_KERNEL);
712 if (res) {
713 usb_kill_urb(kaweth->rx_urb);
714 goto err_out;
715 }
716 kaweth->opened = 1;
717
718 netif_start_queue(net);
719
720 kaweth_async_set_rx_mode(kaweth);
721 return 0;
722
723 err_out:
724 usb_autopm_enable(kaweth->intf);
725 return -EIO;
726 }
727
728 /****************************************************************
729 * kaweth_kill_urbs
730 ****************************************************************/
731 static void kaweth_kill_urbs(struct kaweth_device *kaweth)
732 {
733 usb_kill_urb(kaweth->irq_urb);
734 usb_kill_urb(kaweth->rx_urb);
735 usb_kill_urb(kaweth->tx_urb);
736
737 cancel_delayed_work_sync(&kaweth->lowmem_work);
738
739 /* a scheduled work may have resubmitted,
740 we hit them again */
741 usb_kill_urb(kaweth->irq_urb);
742 usb_kill_urb(kaweth->rx_urb);
743 }
744
745 /****************************************************************
746 * kaweth_close
747 ****************************************************************/
748 static int kaweth_close(struct net_device *net)
749 {
750 struct kaweth_device *kaweth = netdev_priv(net);
751
752 netif_stop_queue(net);
753 kaweth->opened = 0;
754
755 kaweth->status |= KAWETH_STATUS_CLOSING;
756
757 kaweth_kill_urbs(kaweth);
758
759 kaweth->status &= ~KAWETH_STATUS_CLOSING;
760
761 usb_autopm_enable(kaweth->intf);
762
763 return 0;
764 }
765
766 static void kaweth_get_drvinfo(struct net_device *dev, struct ethtool_drvinfo *info)
767 {
768 struct kaweth_device *kaweth = netdev_priv(dev);
769
770 strlcpy(info->driver, driver_name, sizeof(info->driver));
771 usb_make_path(kaweth->dev, info->bus_info, sizeof (info->bus_info));
772 }
773
774 static u32 kaweth_get_link(struct net_device *dev)
775 {
776 struct kaweth_device *kaweth = netdev_priv(dev);
777
778 return kaweth->linkstate;
779 }
780
781 static const struct ethtool_ops ops = {
782 .get_drvinfo = kaweth_get_drvinfo,
783 .get_link = kaweth_get_link
784 };
785
786 /****************************************************************
787 * kaweth_usb_transmit_complete
788 ****************************************************************/
789 static void kaweth_usb_transmit_complete(struct urb *urb)
790 {
791 struct kaweth_device *kaweth = urb->context;
792 struct sk_buff *skb = kaweth->tx_skb;
793 int status = urb->status;
794
795 if (unlikely(status != 0))
796 if (status != -ENOENT)
797 dbg("%s: TX status %d.", kaweth->net->name, status);
798
799 netif_wake_queue(kaweth->net);
800 dev_kfree_skb_irq(skb);
801 }
802
803 /****************************************************************
804 * kaweth_start_xmit
805 ****************************************************************/
806 static netdev_tx_t kaweth_start_xmit(struct sk_buff *skb,
807 struct net_device *net)
808 {
809 struct kaweth_device *kaweth = netdev_priv(net);
810 __le16 *private_header;
811
812 int res;
813
814 spin_lock_irq(&kaweth->device_lock);
815
816 kaweth_async_set_rx_mode(kaweth);
817 netif_stop_queue(net);
818 if (IS_BLOCKED(kaweth->status)) {
819 goto skip;
820 }
821
822 /* We now decide whether we can put our special header into the sk_buff */
823 if (skb_cloned(skb) || skb_headroom(skb) < 2) {
824 /* no such luck - we make our own */
825 struct sk_buff *copied_skb;
826 copied_skb = skb_copy_expand(skb, 2, 0, GFP_ATOMIC);
827 dev_kfree_skb_irq(skb);
828 skb = copied_skb;
829 if (!copied_skb) {
830 kaweth->stats.tx_errors++;
831 netif_start_queue(net);
832 spin_unlock_irq(&kaweth->device_lock);
833 return NETDEV_TX_OK;
834 }
835 }
836
837 private_header = (__le16 *)__skb_push(skb, 2);
838 *private_header = cpu_to_le16(skb->len-2);
839 kaweth->tx_skb = skb;
840
841 usb_fill_bulk_urb(kaweth->tx_urb,
842 kaweth->dev,
843 usb_sndbulkpipe(kaweth->dev, 2),
844 private_header,
845 skb->len,
846 kaweth_usb_transmit_complete,
847 kaweth);
848 kaweth->end = 0;
849
850 if((res = usb_submit_urb(kaweth->tx_urb, GFP_ATOMIC)))
851 {
852 dev_warn(&net->dev, "kaweth failed tx_urb %d\n", res);
853 skip:
854 kaweth->stats.tx_errors++;
855
856 netif_start_queue(net);
857 dev_kfree_skb_irq(skb);
858 }
859 else
860 {
861 kaweth->stats.tx_packets++;
862 kaweth->stats.tx_bytes += skb->len;
863 net->trans_start = jiffies;
864 }
865
866 spin_unlock_irq(&kaweth->device_lock);
867
868 return NETDEV_TX_OK;
869 }
870
871 /****************************************************************
872 * kaweth_set_rx_mode
873 ****************************************************************/
874 static void kaweth_set_rx_mode(struct net_device *net)
875 {
876 struct kaweth_device *kaweth = netdev_priv(net);
877
878 __u16 packet_filter_bitmap = KAWETH_PACKET_FILTER_DIRECTED |
879 KAWETH_PACKET_FILTER_BROADCAST |
880 KAWETH_PACKET_FILTER_MULTICAST;
881
882 dbg("Setting Rx mode to %d", packet_filter_bitmap);
883
884 netif_stop_queue(net);
885
886 if (net->flags & IFF_PROMISC) {
887 packet_filter_bitmap |= KAWETH_PACKET_FILTER_PROMISCUOUS;
888 }
889 else if ((net->mc_count) || (net->flags & IFF_ALLMULTI)) {
890 packet_filter_bitmap |= KAWETH_PACKET_FILTER_ALL_MULTICAST;
891 }
892
893 kaweth->packet_filter_bitmap = packet_filter_bitmap;
894 netif_wake_queue(net);
895 }
896
897 /****************************************************************
898 * kaweth_async_set_rx_mode
899 ****************************************************************/
900 static void kaweth_async_set_rx_mode(struct kaweth_device *kaweth)
901 {
902 int result;
903 __u16 packet_filter_bitmap = kaweth->packet_filter_bitmap;
904
905 kaweth->packet_filter_bitmap = 0;
906 if (packet_filter_bitmap == 0)
907 return;
908
909 if (in_interrupt())
910 return;
911
912 result = kaweth_control(kaweth,
913 usb_sndctrlpipe(kaweth->dev, 0),
914 KAWETH_COMMAND_SET_PACKET_FILTER,
915 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
916 packet_filter_bitmap,
917 0,
918 (void *)&kaweth->scratch,
919 0,
920 KAWETH_CONTROL_TIMEOUT);
921
922 if(result < 0) {
923 err("Failed to set Rx mode: %d", result);
924 }
925 else {
926 dbg("Set Rx mode to %d", packet_filter_bitmap);
927 }
928 }
929
930 /****************************************************************
931 * kaweth_netdev_stats
932 ****************************************************************/
933 static struct net_device_stats *kaweth_netdev_stats(struct net_device *dev)
934 {
935 struct kaweth_device *kaweth = netdev_priv(dev);
936 return &kaweth->stats;
937 }
938
939 /****************************************************************
940 * kaweth_tx_timeout
941 ****************************************************************/
942 static void kaweth_tx_timeout(struct net_device *net)
943 {
944 struct kaweth_device *kaweth = netdev_priv(net);
945
946 dev_warn(&net->dev, "%s: Tx timed out. Resetting.\n", net->name);
947 kaweth->stats.tx_errors++;
948 net->trans_start = jiffies;
949
950 usb_unlink_urb(kaweth->tx_urb);
951 }
952
953 /****************************************************************
954 * kaweth_suspend
955 ****************************************************************/
956 static int kaweth_suspend(struct usb_interface *intf, pm_message_t message)
957 {
958 struct kaweth_device *kaweth = usb_get_intfdata(intf);
959 unsigned long flags;
960
961 dbg("Suspending device");
962 spin_lock_irqsave(&kaweth->device_lock, flags);
963 kaweth->status |= KAWETH_STATUS_SUSPENDING;
964 spin_unlock_irqrestore(&kaweth->device_lock, flags);
965
966 kaweth_kill_urbs(kaweth);
967 return 0;
968 }
969
970 /****************************************************************
971 * kaweth_resume
972 ****************************************************************/
973 static int kaweth_resume(struct usb_interface *intf)
974 {
975 struct kaweth_device *kaweth = usb_get_intfdata(intf);
976 unsigned long flags;
977
978 dbg("Resuming device");
979 spin_lock_irqsave(&kaweth->device_lock, flags);
980 kaweth->status &= ~KAWETH_STATUS_SUSPENDING;
981 spin_unlock_irqrestore(&kaweth->device_lock, flags);
982
983 if (!kaweth->opened)
984 return 0;
985 kaweth_resubmit_rx_urb(kaweth, GFP_NOIO);
986 kaweth_resubmit_int_urb(kaweth, GFP_NOIO);
987
988 return 0;
989 }
990
991 /****************************************************************
992 * kaweth_probe
993 ****************************************************************/
994
995
996 static const struct net_device_ops kaweth_netdev_ops = {
997 .ndo_open = kaweth_open,
998 .ndo_stop = kaweth_close,
999 .ndo_start_xmit = kaweth_start_xmit,
1000 .ndo_tx_timeout = kaweth_tx_timeout,
1001 .ndo_set_multicast_list = kaweth_set_rx_mode,
1002 .ndo_get_stats = kaweth_netdev_stats,
1003 .ndo_change_mtu = eth_change_mtu,
1004 .ndo_set_mac_address = eth_mac_addr,
1005 .ndo_validate_addr = eth_validate_addr,
1006 };
1007
1008 static int kaweth_probe(
1009 struct usb_interface *intf,
1010 const struct usb_device_id *id /* from id_table */
1011 )
1012 {
1013 struct usb_device *dev = interface_to_usbdev(intf);
1014 struct kaweth_device *kaweth;
1015 struct net_device *netdev;
1016 const eth_addr_t bcast_addr = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
1017 int result = 0;
1018
1019 dbg("Kawasaki Device Probe (Device number:%d): 0x%4.4x:0x%4.4x:0x%4.4x",
1020 dev->devnum,
1021 le16_to_cpu(dev->descriptor.idVendor),
1022 le16_to_cpu(dev->descriptor.idProduct),
1023 le16_to_cpu(dev->descriptor.bcdDevice));
1024
1025 dbg("Device at %p", dev);
1026
1027 dbg("Descriptor length: %x type: %x",
1028 (int)dev->descriptor.bLength,
1029 (int)dev->descriptor.bDescriptorType);
1030
1031 netdev = alloc_etherdev(sizeof(*kaweth));
1032 if (!netdev)
1033 return -ENOMEM;
1034
1035 kaweth = netdev_priv(netdev);
1036 kaweth->dev = dev;
1037 kaweth->net = netdev;
1038
1039 spin_lock_init(&kaweth->device_lock);
1040 init_waitqueue_head(&kaweth->term_wait);
1041
1042 dbg("Resetting.");
1043
1044 kaweth_reset(kaweth);
1045
1046 /*
1047 * If high byte of bcdDevice is nonzero, firmware is already
1048 * downloaded. Don't try to do it again, or we'll hang the device.
1049 */
1050
1051 if (le16_to_cpu(dev->descriptor.bcdDevice) >> 8) {
1052 dev_info(&intf->dev, "Firmware present in device.\n");
1053 } else {
1054 /* Download the firmware */
1055 dev_info(&intf->dev, "Downloading firmware...\n");
1056 kaweth->firmware_buf = (__u8 *)__get_free_page(GFP_KERNEL);
1057 if ((result = kaweth_download_firmware(kaweth,
1058 "kaweth/new_code.bin",
1059 100,
1060 2)) < 0) {
1061 err("Error downloading firmware (%d)", result);
1062 goto err_fw;
1063 }
1064
1065 if ((result = kaweth_download_firmware(kaweth,
1066 "kaweth/new_code_fix.bin",
1067 100,
1068 3)) < 0) {
1069 err("Error downloading firmware fix (%d)", result);
1070 goto err_fw;
1071 }
1072
1073 if ((result = kaweth_download_firmware(kaweth,
1074 "kaweth/trigger_code.bin",
1075 126,
1076 2)) < 0) {
1077 err("Error downloading trigger code (%d)", result);
1078 goto err_fw;
1079
1080 }
1081
1082 if ((result = kaweth_download_firmware(kaweth,
1083 "kaweth/trigger_code_fix.bin",
1084 126,
1085 3)) < 0) {
1086 err("Error downloading trigger code fix (%d)", result);
1087 goto err_fw;
1088 }
1089
1090
1091 if ((result = kaweth_trigger_firmware(kaweth, 126)) < 0) {
1092 err("Error triggering firmware (%d)", result);
1093 goto err_fw;
1094 }
1095
1096 /* Device will now disappear for a moment... */
1097 dev_info(&intf->dev, "Firmware loaded. I'll be back...\n");
1098 err_fw:
1099 free_page((unsigned long)kaweth->firmware_buf);
1100 free_netdev(netdev);
1101 return -EIO;
1102 }
1103
1104 result = kaweth_read_configuration(kaweth);
1105
1106 if(result < 0) {
1107 err("Error reading configuration (%d), no net device created", result);
1108 goto err_free_netdev;
1109 }
1110
1111 dev_info(&intf->dev, "Statistics collection: %x\n", kaweth->configuration.statistics_mask);
1112 dev_info(&intf->dev, "Multicast filter limit: %x\n", kaweth->configuration.max_multicast_filters & ((1 << 15) - 1));
1113 dev_info(&intf->dev, "MTU: %d\n", le16_to_cpu(kaweth->configuration.segment_size));
1114 dev_info(&intf->dev, "Read MAC address %2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
1115 (int)kaweth->configuration.hw_addr[0],
1116 (int)kaweth->configuration.hw_addr[1],
1117 (int)kaweth->configuration.hw_addr[2],
1118 (int)kaweth->configuration.hw_addr[3],
1119 (int)kaweth->configuration.hw_addr[4],
1120 (int)kaweth->configuration.hw_addr[5]);
1121
1122 if(!memcmp(&kaweth->configuration.hw_addr,
1123 &bcast_addr,
1124 sizeof(bcast_addr))) {
1125 err("Firmware not functioning properly, no net device created");
1126 goto err_free_netdev;
1127 }
1128
1129 if(kaweth_set_urb_size(kaweth, KAWETH_BUF_SIZE) < 0) {
1130 dbg("Error setting URB size");
1131 goto err_free_netdev;
1132 }
1133
1134 if(kaweth_set_sofs_wait(kaweth, KAWETH_SOFS_TO_WAIT) < 0) {
1135 err("Error setting SOFS wait");
1136 goto err_free_netdev;
1137 }
1138
1139 result = kaweth_set_receive_filter(kaweth,
1140 KAWETH_PACKET_FILTER_DIRECTED |
1141 KAWETH_PACKET_FILTER_BROADCAST |
1142 KAWETH_PACKET_FILTER_MULTICAST);
1143
1144 if(result < 0) {
1145 err("Error setting receive filter");
1146 goto err_free_netdev;
1147 }
1148
1149 dbg("Initializing net device.");
1150
1151 kaweth->intf = intf;
1152
1153 kaweth->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
1154 if (!kaweth->tx_urb)
1155 goto err_free_netdev;
1156 kaweth->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
1157 if (!kaweth->rx_urb)
1158 goto err_only_tx;
1159 kaweth->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1160 if (!kaweth->irq_urb)
1161 goto err_tx_and_rx;
1162
1163 kaweth->intbuffer = usb_buffer_alloc( kaweth->dev,
1164 INTBUFFERSIZE,
1165 GFP_KERNEL,
1166 &kaweth->intbufferhandle);
1167 if (!kaweth->intbuffer)
1168 goto err_tx_and_rx_and_irq;
1169 kaweth->rx_buf = usb_buffer_alloc( kaweth->dev,
1170 KAWETH_BUF_SIZE,
1171 GFP_KERNEL,
1172 &kaweth->rxbufferhandle);
1173 if (!kaweth->rx_buf)
1174 goto err_all_but_rxbuf;
1175
1176 memcpy(netdev->broadcast, &bcast_addr, sizeof(bcast_addr));
1177 memcpy(netdev->dev_addr, &kaweth->configuration.hw_addr,
1178 sizeof(kaweth->configuration.hw_addr));
1179
1180 netdev->netdev_ops = &kaweth_netdev_ops;
1181 netdev->watchdog_timeo = KAWETH_TX_TIMEOUT;
1182 netdev->mtu = le16_to_cpu(kaweth->configuration.segment_size);
1183 SET_ETHTOOL_OPS(netdev, &ops);
1184
1185 /* kaweth is zeroed as part of alloc_netdev */
1186 INIT_DELAYED_WORK(&kaweth->lowmem_work, kaweth_resubmit_tl);
1187 usb_set_intfdata(intf, kaweth);
1188
1189 #if 0
1190 // dma_supported() is deeply broken on almost all architectures
1191 if (dma_supported (&intf->dev, 0xffffffffffffffffULL))
1192 kaweth->net->features |= NETIF_F_HIGHDMA;
1193 #endif
1194
1195 SET_NETDEV_DEV(netdev, &intf->dev);
1196 if (register_netdev(netdev) != 0) {
1197 err("Error registering netdev.");
1198 goto err_intfdata;
1199 }
1200
1201 dev_info(&intf->dev, "kaweth interface created at %s\n",
1202 kaweth->net->name);
1203
1204 dbg("Kaweth probe returning.");
1205
1206 return 0;
1207
1208 err_intfdata:
1209 usb_set_intfdata(intf, NULL);
1210 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1211 err_all_but_rxbuf:
1212 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1213 err_tx_and_rx_and_irq:
1214 usb_free_urb(kaweth->irq_urb);
1215 err_tx_and_rx:
1216 usb_free_urb(kaweth->rx_urb);
1217 err_only_tx:
1218 usb_free_urb(kaweth->tx_urb);
1219 err_free_netdev:
1220 free_netdev(netdev);
1221
1222 return -EIO;
1223 }
1224
1225 /****************************************************************
1226 * kaweth_disconnect
1227 ****************************************************************/
1228 static void kaweth_disconnect(struct usb_interface *intf)
1229 {
1230 struct kaweth_device *kaweth = usb_get_intfdata(intf);
1231 struct net_device *netdev;
1232
1233 dev_info(&intf->dev, "Unregistering\n");
1234
1235 usb_set_intfdata(intf, NULL);
1236 if (!kaweth) {
1237 dev_warn(&intf->dev, "unregistering non-existant device\n");
1238 return;
1239 }
1240 netdev = kaweth->net;
1241
1242 dbg("Unregistering net device");
1243 unregister_netdev(netdev);
1244
1245 usb_free_urb(kaweth->rx_urb);
1246 usb_free_urb(kaweth->tx_urb);
1247 usb_free_urb(kaweth->irq_urb);
1248
1249 usb_buffer_free(kaweth->dev, KAWETH_BUF_SIZE, (void *)kaweth->rx_buf, kaweth->rxbufferhandle);
1250 usb_buffer_free(kaweth->dev, INTBUFFERSIZE, (void *)kaweth->intbuffer, kaweth->intbufferhandle);
1251
1252 free_netdev(netdev);
1253 }
1254
1255
1256 // FIXME this completion stuff is a modified clone of
1257 // an OLD version of some stuff in usb.c ...
1258 struct usb_api_data {
1259 wait_queue_head_t wqh;
1260 int done;
1261 };
1262
1263 /*-------------------------------------------------------------------*
1264 * completion handler for compatibility wrappers (sync control/bulk) *
1265 *-------------------------------------------------------------------*/
1266 static void usb_api_blocking_completion(struct urb *urb)
1267 {
1268 struct usb_api_data *awd = (struct usb_api_data *)urb->context;
1269
1270 awd->done=1;
1271 wake_up(&awd->wqh);
1272 }
1273
1274 /*-------------------------------------------------------------------*
1275 * COMPATIBILITY STUFF *
1276 *-------------------------------------------------------------------*/
1277
1278 // Starts urb and waits for completion or timeout
1279 static int usb_start_wait_urb(struct urb *urb, int timeout, int* actual_length)
1280 {
1281 struct usb_api_data awd;
1282 int status;
1283
1284 init_waitqueue_head(&awd.wqh);
1285 awd.done = 0;
1286
1287 urb->context = &awd;
1288 status = usb_submit_urb(urb, GFP_NOIO);
1289 if (status) {
1290 // something went wrong
1291 usb_free_urb(urb);
1292 return status;
1293 }
1294
1295 if (!wait_event_timeout(awd.wqh, awd.done, timeout)) {
1296 // timeout
1297 dev_warn(&urb->dev->dev, "usb_control/bulk_msg: timeout\n");
1298 usb_kill_urb(urb); // remove urb safely
1299 status = -ETIMEDOUT;
1300 }
1301 else {
1302 status = urb->status;
1303 }
1304
1305 if (actual_length) {
1306 *actual_length = urb->actual_length;
1307 }
1308
1309 usb_free_urb(urb);
1310 return status;
1311 }
1312
1313 /*-------------------------------------------------------------------*/
1314 // returns status (negative) or length (positive)
1315 static int kaweth_internal_control_msg(struct usb_device *usb_dev,
1316 unsigned int pipe,
1317 struct usb_ctrlrequest *cmd, void *data,
1318 int len, int timeout)
1319 {
1320 struct urb *urb;
1321 int retv;
1322 int length = 0; /* shut up GCC */
1323
1324 urb = usb_alloc_urb(0, GFP_NOIO);
1325 if (!urb)
1326 return -ENOMEM;
1327
1328 usb_fill_control_urb(urb, usb_dev, pipe, (unsigned char*)cmd, data,
1329 len, usb_api_blocking_completion, NULL);
1330
1331 retv = usb_start_wait_urb(urb, timeout, &length);
1332 if (retv < 0) {
1333 return retv;
1334 }
1335 else {
1336 return length;
1337 }
1338 }
1339
1340
1341 /****************************************************************
1342 * kaweth_init
1343 ****************************************************************/
1344 static int __init kaweth_init(void)
1345 {
1346 dbg("Driver loading");
1347 return usb_register(&kaweth_driver);
1348 }
1349
1350 /****************************************************************
1351 * kaweth_exit
1352 ****************************************************************/
1353 static void __exit kaweth_exit(void)
1354 {
1355 usb_deregister(&kaweth_driver);
1356 }
1357
1358 module_init(kaweth_init);
1359 module_exit(kaweth_exit);
1360
1361
1362
1363
1364
1365
1366
1367
1368
x86 "subsystem" repository